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<h1>C 语言实例 - 约瑟夫生者死者小游戏</h1>
<p><a href="../cprogramming/c-examples.html"><img decoding="async" c="" lass="navup" src="/images/up.gif" alt="C 语言实例"> C 语言实例</a></p>
<p>30 个人在一条船上，超载，需要 15 人下船。</p>
<p>于是人们排成一队，排队的位置即为他们的编号。</p>
<p>报数，从 1 开始，数到 9 的人下船。</p>
<p>如此循环，直到船上仅剩 15 人为止，问都有哪些编号的人下船了呢？</p>


<div class="example"><h2 class="example">实例</h2><div class="example_code"><div class="hl-main"><span class="hl-prepro">#include</span><span class="hl-quotes">&lt;</span><span class="hl-string">stdio.h</span><span class="hl-quotes">&gt;</span><span class="hl-prepro"></span><span class="hl-code">
 
</span><span class="hl-types">int</span><span class="hl-code"> </span><span class="hl-identifier">c</span><span class="hl-code"> = </span><span class="hl-number">0</span><span class="hl-code">;
</span><span class="hl-types">int</span><span class="hl-code"> </span><span class="hl-identifier">i</span><span class="hl-code"> = </span><span class="hl-number">1</span><span class="hl-code">;
</span><span class="hl-types">int</span><span class="hl-code"> </span><span class="hl-identifier">j</span><span class="hl-code"> = </span><span class="hl-number">0</span><span class="hl-code">;
</span><span class="hl-types">int</span><span class="hl-code"> </span><span class="hl-identifier">a</span><span class="hl-brackets">[</span><span class="hl-number">30</span><span class="hl-brackets">]</span><span class="hl-code"> = </span><span class="hl-brackets">{</span><span class="hl-code"> </span><span class="hl-number">0</span><span class="hl-code"> </span><span class="hl-brackets">}</span><span class="hl-code">;
</span><span class="hl-types">int</span><span class="hl-code"> </span><span class="hl-identifier">b</span><span class="hl-brackets">[</span><span class="hl-number">30</span><span class="hl-brackets">]</span><span class="hl-code"> = </span><span class="hl-brackets">{</span><span class="hl-code"> </span><span class="hl-number">0</span><span class="hl-code"> </span><span class="hl-brackets">}</span><span class="hl-code">;
 
</span><span class="hl-types">int</span><span class="hl-code"> </span><span class="hl-identifier">main</span><span class="hl-brackets">(</span><span class="hl-brackets">)</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
    </span><span class="hl-reserved">while</span><span class="hl-code"> </span><span class="hl-brackets">(</span><span class="hl-identifier">i</span><span class="hl-code">&lt;=</span><span class="hl-number">31</span><span class="hl-brackets">)</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
        </span><span class="hl-reserved">if</span><span class="hl-code"> </span><span class="hl-brackets">(</span><span class="hl-identifier">i</span><span class="hl-code"> == </span><span class="hl-number">31</span><span class="hl-brackets">)</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
            </span><span class="hl-identifier">i</span><span class="hl-code"> = </span><span class="hl-number">1</span><span class="hl-code">;
        </span><span class="hl-brackets">}</span><span class="hl-code"> </span><span class="hl-reserved">else</span><span class="hl-code"> </span><span class="hl-reserved">if</span><span class="hl-code"> </span><span class="hl-brackets">(</span><span class="hl-identifier">c</span><span class="hl-code"> == </span><span class="hl-number">15</span><span class="hl-brackets">)</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
            </span><span class="hl-reserved">break</span><span class="hl-code">;
        </span><span class="hl-brackets">}</span><span class="hl-code"> </span><span class="hl-reserved">else</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
            </span><span class="hl-reserved">if</span><span class="hl-code"> </span><span class="hl-brackets">(</span><span class="hl-identifier">b</span><span class="hl-brackets">[</span><span class="hl-identifier">i</span><span class="hl-brackets">]</span><span class="hl-code"> != </span><span class="hl-number">0</span><span class="hl-brackets">)</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
                </span><span class="hl-identifier">i</span><span class="hl-code">++;
                </span><span class="hl-reserved">continue</span><span class="hl-code">;
            </span><span class="hl-brackets">}</span><span class="hl-code"> </span><span class="hl-reserved">else</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
                </span><span class="hl-identifier">j</span><span class="hl-code">++;
                </span><span class="hl-reserved">if</span><span class="hl-code"> </span><span class="hl-brackets">(</span><span class="hl-identifier">j</span><span class="hl-code"> != </span><span class="hl-number">9</span><span class="hl-brackets">)</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
                    </span><span class="hl-identifier">i</span><span class="hl-code">++;
                    </span><span class="hl-reserved">continue</span><span class="hl-code">;
                </span><span class="hl-brackets">}</span><span class="hl-code"> </span><span class="hl-reserved">else</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
                    </span><span class="hl-identifier">b</span><span class="hl-brackets">[</span><span class="hl-identifier">i</span><span class="hl-brackets">]</span><span class="hl-code"> = </span><span class="hl-number">1</span><span class="hl-code">;
                    </span><span class="hl-identifier">a</span><span class="hl-brackets">[</span><span class="hl-identifier">i</span><span class="hl-brackets">]</span><span class="hl-code"> = </span><span class="hl-identifier">j</span><span class="hl-code">;
                    </span><span class="hl-identifier">j</span><span class="hl-code"> = </span><span class="hl-number">0</span><span class="hl-code">;
                    </span><span class="hl-identifier">printf</span><span class="hl-brackets">(</span><span class="hl-quotes">&quot;</span><span class="hl-string">第%d号下船了</span><span class="hl-special">\</span><span class="hl-string">n</span><span class="hl-quotes">&quot;</span><span class="hl-code">, </span><span class="hl-identifier">i</span><span class="hl-brackets">)</span><span class="hl-code">;
                    </span><span class="hl-identifier">i</span><span class="hl-code">++;
                    </span><span class="hl-identifier">c</span><span class="hl-code">++;
                </span><span class="hl-brackets">}</span><span class="hl-code">
            </span><span class="hl-brackets">}</span><span class="hl-code">
        </span><span class="hl-brackets">}</span><span class="hl-code">
    </span><span class="hl-brackets">}</span><span class="hl-code">
</span><span class="hl-brackets">}</span></div></div></div>
<p>执行以上实例，输出结果为：</p>
<pre>第9号下船了
第18号下船了
第27号下船了
第6号下船了
第16号下船了
第26号下船了
第7号下船了
第19号下船了
第30号下船了
第12号下船了
第24号下船了
第8号下船了
第22号下船了
第5号下船了
第23号下船了</pre>
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		<li class="comment even thread-even depth-1" id="comment-39663"><span class="comt-f">#0</span><div class="comt-avatar wrapper"><i style="font-size:36px;" class="fa fa-user-circle" aria-hidden="true"></i><div class="tooltip"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;袁博</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;cdy***98@163.com</p></div><div id="runoobvote-id-39663" data-commid = "39663" class="upvotejs"><a class="upvote"></a> <span class="count">102</span></div></div><div class="comt-main" id="div-comment-39663"><p>我认为用一个数组完成这个算法更好理解。</p>

<pre>#include&lt;stdio.h&gt;

int main(){
    int count=0,//记录下船的人数 ，到15就终止程序 
    a[30]={0},//储存30人信息，0代表在船上，1代表下船了 
    i=0,//循环索引 
    c=0;// 记录报数号码，到9就清零，由下一位重新报数 
    while(1) { 
        if(a[i]==0)c++;//记录报数号码
        if(c==9){
            count++;//下船人数加一 
            a[i]=1; //标记这个人下船了
            printf("第%d号下船了。\n",i+1);
            c=0;//到9就清零，由下一位从0重新报数 
        }
        if(count==15)break;//下船的人数到15就终止程序 
        i++;//分析下一个人 
        if(i==30)i=0; //将数组变成一个圈，循环往复 
    }
    return 0; 
}</pre>

<div class="comt-meta wrapper"><span class="comt-author"><a target="_blank" href="javascript:;">袁博</a><div class="tooltip tooltip1"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;袁博</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;cdy***98@163.com</p></div></span>4年前 (2019-02-10)</div></div></li><!-- #comment-## -->
<li class="comment odd alt thread-odd thread-alt depth-1" id="comment-40587"><span class="comt-f">#0</span><div class="comt-avatar wrapper"><i style="font-size:36px;" class="fa fa-user-circle" aria-hidden="true"></i><div class="tooltip"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;lsz</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;257***7596@qq.com</p></div><div id="runoobvote-id-40587" data-commid = "40587" class="upvotejs"><a class="upvote"></a> <span class="count">2</span></div></div><div class="comt-main" id="div-comment-40587"><pre>#include &lt;stdio.h&gt;

int main()
{
    int arr[30];  //创建30的数组，值全部为1
    for(int i = 0;i&lt;30;i++){
        arr[i]=1;
    }

    int nowP = -1;  //当前报出的数，-1 开始因为 while 一开始就要 ++
    int callTime = 0;  //当前共有几个人下船，即完成了几次0-8（1-9）的报数
    int realP = -1;    //当前报数的人的真是位置
    while(callTime!=15){   //只要下船人数没达到15 即一只报数
        realP++;           //开始记录当前哪个位置在报
        if(realP == 30)realP = 0;   //如果当前该坐标为30的人，即第"31"个人报，马上切换到第0个人开始报
        if(arr[realP] != 0)nowP++;  //如果当前人的状态不是0，即仍在船上，就记录一次报数。
        if(nowP == 8){    //如果报到的数字为8，即第九人，则下船人数+1
            callTime++;
            arr[realP] = 0;   //1改为0，标记为已下船
            nowP = -1;        //重置nowP，下一个人继续从0报
            printf("Number %d is out.\n",realP+1);  //输出当前下船的人
        }
    }
    return 0;
}</pre><div class="comt-meta wrapper"><span class="comt-author"><a target="_blank" href="javascript:;">lsz</a><div class="tooltip tooltip1"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;lsz</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;257***7596@qq.com</p></div></span>4年前 (2019-03-10)</div></div></li><!-- #comment-## -->
<li class="comment even thread-even depth-1" id="comment-41579"><span class="comt-f">#0</span><div class="comt-avatar wrapper"><i style="font-size:36px;" class="fa fa-user-circle" aria-hidden="true"></i><div class="tooltip"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;zhaojingjing</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;jzh***upt@163.com</p></div><div id="runoobvote-id-41579" data-commid = "41579" class="upvotejs"><a class="upvote"></a> <span class="count">4</span></div></div><div class="comt-main" id="div-comment-41579"><p>用一种比较复杂的方式解决。</p>
<p>前面的用的方法都比较简单，可惜我没想到，我一上来就想的是用循环链表。</p>
<pre>#include &lt;stdio.h&gt;
#include &lt;stdlib.h&gt;
#include &lt;stdbool.h&gt;
#include &lt;string.h&gt;
typedef struct num{
    int num;
    struct num * next;
}student ;
int main()
{
    int i,j;
    student* head = NULL;
    student* tail = NULL ;
    student* p = NULL;
    student* q = NULL;
    student *temp;
    bool ishead = true;

    for(i=1;i&lt;31;i++)
    {
        student *people = malloc(sizeof(student));
        people-&gt;num=i;
        if(ishead){
            head = people;
            head -&gt;next = NULL;
            tail = people;
            ishead = false;
        }
        else
        {
            tail-&gt;next = people;
            tail = people;
        }
    }
    if(NULL!=tail || NULL == tail)
        tail -&gt;next = head;
    i=30;
    p=head;
    q=head;
while(i&gt;15)    
{
    for(j=1;j&lt;10;j++)
    {
        //printf(" now the num %d \n",p-&gt;num);
        if(j==9)
        {
            printf("the num %d get off \n",p-&gt;num);
                
            i--;
            q-&gt;next = p-&gt;next;
            free(p);
            p=q-&gt;next;
        }
        else{
            q=p;
        p=p-&gt;next;
        }
    }
}
   return 0;
}</pre><div class="comt-meta wrapper"><span class="comt-author"><a target="_blank" href="javascript:;">zhaojingjing</a><div class="tooltip tooltip1"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;zhaojingjing</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;jzh***upt@163.com</p></div></span>4年前 (2019-04-07)</div></div></li><!-- #comment-## -->
<li class="comment odd alt thread-odd thread-alt depth-1" id="comment-42362"><span class="comt-f">#0</span><div class="comt-avatar wrapper"><i style="font-size:36px;" class="fa fa-user-circle" aria-hidden="true"></i><div class="tooltip"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;starrysky</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;847***051@qq.com</p></div><div id="runoobvote-id-42362" data-commid = "42362" class="upvotejs"><a class="upvote"></a> <span class="count">0</span></div></div><div class="comt-main" id="div-comment-42362"><p>先确定哪个位置的人会报出 9，找到之后下一次跳过此人，直至人数等于 15。</p>

<pre>#include&lt;stdio.h&gt;

int main()

{
    int i= 1;   //绝对位置参数，代表当前的真实位置
    int size = 30;  //总人数
    int b = 1;  //当前的报数，或者说相对位置，每循环一次都加1,至多为9
    int flag[30];   //记录数组，记录当前位置是否已选，已选记为1
    for(int j = 0 ; j &lt; 30 ; j++)
    {
         flag[j] = 0;   //记录数组初始化为0   
    }
    int num[30];    //位置数组
    for(int j = 0 ; j &lt; 30 ; j++)
    {
        num[j] = j+1;   //位置数组初始化
    }

    while(size &gt;15) //15人下船，因此人数大于15时才执行
    {
        if(i == 31) //30即为最后一个人，下一轮要从头开始，因此30的下一个31实际是第1
            i = 1;
         if(b == 10)    //以9为循环，报数到9，下一个10改报1
                b = 1;
          if(flag[i] == 1)  //判断之前是否已经报过9
            {
                    b--;  //跳过之前被选的人
                            //举例说明：第一轮筛选，9这个位置被选了，并通过flag[8]记录9这里已选。在第二轮筛选时就需要跳过9这里，假设第二轮第8个位置报数是1，第9个位置跳过，则第10个位置的报数为2。
                            //而每次循环b都自加，所以9这里b自减，保证位置10的b值正确，其他位置同理
            }  
            if(b == 9) //若当前报数为9
            {
                flag[i] = 1;    //标记此人已经报出过9
                printf("%d\n" , num[i-1]);    //打印报数为 9 的人的绝对位置
                size--;     //找到一个人，总人数减1
            }
            i++;    //绝对位置自加
            b++;    //报数自加
    }
}</pre><div class="comt-meta wrapper"><span class="comt-author"><a target="_blank" href="javascript:;">starrysky</a><div class="tooltip tooltip1"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;starrysky</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;847***051@qq.com</p></div></span>4年前 (2019-04-30)</div></div></li><!-- #comment-## -->
<li class="comment even thread-even depth-1" id="comment-43007"><span class="comt-f">#0</span><div class="comt-avatar wrapper"><i style="font-size:36px;" class="fa fa-user-circle" aria-hidden="true"></i><div class="tooltip"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;夜雨无愁</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;295***5188@qq.com</p></div><div id="runoobvote-id-43007" data-commid = "43007" class="upvotejs"><a class="upvote"></a> <span class="count">1</span></div></div><div class="comt-main" id="div-comment-43007"><p>参考方法：</p>
<pre>#include &lt;stdio.h&gt;
#include &lt;stdlib.h&gt;

#define ss 30    //定义总人数
#define sw 15    //定义下船人数
#define gz 9    //定义下船规则
#define bz (ss*10)    //定义下船标志

int main()
{
    int * arr_ss;
    int k = -1;
    arr_ss = (int *)malloc(ss * sizeof(int));//创建数组储存人数编号
    for(int i = 0;i &lt; ss;i++)//对人数进行编号
    {
        arr_ss[i] = i + 1;
    }

    for(char n = 0;n &lt; sw;n++)//循环sw次
    {
        for(char m = 0; m &lt; gz;m++)//循环gz次
        {
            if(k &lt; ss - 1)             //令其循环报数
                k++;                   //为什么是ss-1
            else                       //因为k &lt; ss会在k = 30时将k复位为0，而数组只有29
                k = 0;                   //所以 k &lt; ss - 1才会在k = 29时将k复位为0
            if(arr_ss[k] &gt; bz)
            {                         //如果当前编号已经被标志，
                m--; //那么我们接着下一个编号报数
            }
        }
        printf("%d号下船\n",arr_ss[k]);
        arr_ss[k] += bz;//标志已经下船的编号
    }
}</pre><div class="comt-meta wrapper"><span class="comt-author"><a target="_blank" href="javascript:;">夜雨无愁</a><div class="tooltip tooltip1"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;夜雨无愁</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;295***5188@qq.com</p></div></span>4年前 (2019-05-22)</div></div></li><!-- #comment-## -->
<li class="comment odd alt thread-odd thread-alt depth-1" id="comment-45330"><span class="comt-f">#0</span><div class="comt-avatar wrapper"><i style="font-size:36px;" class="fa fa-user-circle" aria-hidden="true"></i><div class="tooltip"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;big_tree</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;286***4460@qq.com</p></div><div id="runoobvote-id-45330" data-commid = "45330" class="upvotejs"><a class="upvote"></a> <span class="count">1</span></div></div><div class="comt-main" id="div-comment-45330"><p>上面都是大佬，在没看笔记之前，自己也按照自己的思路写了一下。</p><p>思路：就像把30张扑克牌叠在一起，抽到了，就丢掉。难点在于如何将收尾衔接好</p><pre>
#include &lt;stdio.h&gt;

int main()
{
    int i=0,j=1,m=0;
    int a[31] = { 0 };
    for (m=0;m&lt;15;m++){
        for (;i&lt;9;){
            if(a[j]==0){
                j++;
                i++;
            }
            else j++;
            if (j==31)
                j=1;
        }
        if ((j-1)==0){
            printf("第30号下船\n");
            a[30]=1;
            j=1;
        }
        else{            
            printf("第%d号下船了\n",j-1);
            a[j-1]=1;
        }
        i=0;    
    }
    return 0;
}
</pre><div class="comt-meta wrapper"><span class="comt-author"><a target="_blank" href="javascript:;">big_tree</a><div class="tooltip tooltip1"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;big_tree</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;286***4460@qq.com</p></div></span>4年前 (2019-08-02)</div></div></li><!-- #comment-## -->
<li class="comment even thread-even depth-1" id="comment-49042"><span class="comt-f">#0</span><div class="comt-avatar wrapper"><i style="font-size:36px;" class="fa fa-user-circle" aria-hidden="true"></i><div class="tooltip"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;Justin</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;576***135@qq.com</p></div><div id="runoobvote-id-49042" data-commid = "49042" class="upvotejs"><a class="upvote"></a> <span class="count">1</span></div></div><div class="comt-main" id="div-comment-49042"><p>参考：</p>
<pre>#include &lt;stdio.h&gt;

int main()
{
    int nCount = 0; //记录下船人数，到15终止
    int arr[30] = {0};//船上人数组，0表示在船上，1表示下船了
    int i = 0;//循环索引
    int c = 0;//从1-9报数的号码
    
    while ( nCount &lt; 15 )
    {
        i++;
        if (i == 31)
        {
            i = 1;
        }
        
        if ( arr[i] != 1 )//没有下船的人才参与报数
        {
            c++;
        }
        
        if ( c == 9 )//报到9的人下船，下一个人重新报数
        {
            nCount++;
            c = 0;
            arr[i] = 1;
            printf("\n----&gt;%d:第%d号下船\n", nCount, i);
        }
    }
    return 0;
}</pre><div class="comt-meta wrapper"><span class="comt-author"><a target="_blank" href="javascript:;">Justin</a><div class="tooltip tooltip1"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;Justin</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;576***135@qq.com</p></div></span>3年前 (2019-12-05)</div></div></li><!-- #comment-## -->
<li class="comment odd alt thread-odd thread-alt depth-1" id="comment-49775"><span class="comt-f">#0</span><div class="comt-avatar wrapper"><i style="font-size:36px;" class="fa fa-user-circle" aria-hidden="true"></i><div class="tooltip"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;13579</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;946***726@qq.com</p></div><div id="runoobvote-id-49775" data-commid = "49775" class="upvotejs"><a class="upvote"></a> <span class="count">3</span></div></div><div class="comt-main" id="div-comment-49775"><p>看了一遍都是用标记的，为什么没有这种解法呢？</p>

<pre>#include&lt;stdio.h&gt;

int main()
{
    int man[30],i,j=0,l=1;
    
    for(i=0;i&lt;30;i++)(man[i]=l++);
    
    int *hum;
    int k=0,die[15];
    
    while(k&lt;15)
    {
        hum=man;
        for(i=0;i&lt;30-k;hum++)
        {
            if(++j==9)
            {
                die[k]=*hum;
                k++;
                j=0;
            }
            else
            {
                man[i]=*hum;
                i++;
            }
        }
    }
    
    for(i=0;i&lt;15;i++)(printf("%d\t",die[i]));
}</pre><div class="comt-meta wrapper"><span class="comt-author"><a target="_blank" href="javascript:;">13579</a><div class="tooltip tooltip1"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;13579</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;946***726@qq.com</p></div></span>3年前 (2020-01-02)</div></div></li><!-- #comment-## -->
<li class="comment even thread-even depth-1" id="comment-75067"><span class="comt-f">#0</span><div class="comt-avatar wrapper"><i style="font-size:36px;" class="fa fa-user-circle" aria-hidden="true"></i><div class="tooltip"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;大宅院里的三表哥</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;gul***r@outlook.com</p></div><div id="runoobvote-id-75067" data-commid = "75067" class="upvotejs"><a class="upvote"></a> <span class="count">3</span></div></div><div class="comt-main" id="div-comment-75067"><p><strong>使用数组：</strong></p>

<pre>#include &lt;stdio.h&gt;

#define LIVES 30  // 船上的初始人数
#define DEADS 15  // 需要下船的人数
#define DEAD_NUM 9  // 数到该数下船

int main()
{
    static int died[LIVES];  // 0代表在船上，1代表下船了
    int i, j, cur=0;        // cur表示当前报数的人的编号-1
    for(i=0; i&lt;DEADS; i++)  // 每次循环下船一个人
    {
        for(j=0; j&lt;DEAD_NUM; j+=1-died[cur++])  // 开始一轮报数
            if(cur == LIVES) cur = 0;  // 最后一个人报完则又从第一个人开始
        printf("第%d号下船了\n", cur);
        died[cur-1] = 1;  // 记录下船信息
    }
    return 0;
}</pre>
<p><strong>使用链表：</strong></p>

<pre>#include &lt;stdio.h&gt;

#define LIVES 30  // 船上的初始人数
#define DEADS 15  // 需要下船的人数
#define DEAD_NUM 9  // 数到该数下船

struct person {
    unsigned id;
    struct person *next;
} persons[LIVES], *p, *before;

int main()
{
    int i, j;
    // 初始化循环链表
    for(i=0; i&lt;LIVES; i++)
    {
        persons[i].id = i + 1;  // 从1开始给船上的人编号
        persons[i].next = persons + i + 1;
    }
    persons[LIVES-1].next = persons;

    p = persons + LIVES - 1;  // 计数开始时会忽略第一个人，故设置初始值为最后一个人
    for(i=0; i&lt;DEADS; i++)
    {
        // 报数
        for(j=0; j&lt;DEAD_NUM-1; j++) p = p-&gt;next;
        // 使before指向下船人的前一个人
        before = p, p = p-&gt;next;
        printf("第%u号下船了\n", p-&gt;id);
        // 将下船人的前一个人与后一个人建立前后关系
        before-&gt;next = p-&gt;next;
    }
    return 0;
}</pre>
<p><strong>使用公式法递推：</strong></p>

<pre>#include &lt;stdio.h&gt;

#define LIVES 30  // 船上的初始人数
#define DEADS 15  // 需要下船的人数
#define DEAD_NUM 9  // 数到该数下船

int main()
{
    int i, j, id;  // id表示下船的人的编号
    for(i=0; i&lt;DEADS; i++)  // 每次循环下船一个人
    {
        for(j=i, id=-1; j&gt;=0; j--)
            id = (id + DEAD_NUM)%(LIVES - j);
        printf("第%d号下船了\n", id+1);
    }
    return 0;
}</pre><div class="comt-meta wrapper"><span class="comt-author"><a target="_blank" href="javascript:;">大宅院里的三表哥</a><div class="tooltip tooltip1"><p><i class="fa fa-user" aria-hidden="true"></i>&nbsp;&nbsp;&nbsp;大宅院里的三表哥</p><p><i class="fa fa-envelope" aria-hidden="true"></i>&nbsp;&nbsp;gul***r@outlook.com</p></div></span>8个月前 (09-06)</div></div></li><!-- #comment-## -->
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	 // upload: {url:'/api/comment_upload_file.php',params: null,fileKey: 'upload_file',connectionCount: 1,leaveConfirm: '文件正在上传，您确定离开?'},
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	// 提交笔记
	var commentform=$('#commentform');
	commentform.prepend('<div id="comment-status" style="display:none;" ></div>');
	var statusdiv=$('#comment-status');
	
	commentform.submit(function(e){
		e.preventDefault();
		var noteContent = editor.getValue();
		// console.log(noteContent);
		noteContent = noteContent.replace(/<pre><code>/g,"<pre>");
		noteContent = noteContent.replace(/<\/code><\/pre>/g,"</pre>");
		
		// 系列化表单数据
		var comment_parent = 0;
		var is_user_logged_in = $("#is_user_logged_in").val();
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			// var formdata=commentform.serialize() + "&comment=" + noteContent ;
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					type: 'post',
					url: formurl,
					dataType:'json',
					data: {"comment_parent":comment_parent,"comment_post_ID":comment_post_ID, "_wp_unfiltered_html_comment":_wp_unfiltered_html_comment,"comment":comment,"url":url, "email":email,"author":author},
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	var ajaxurl = 'https://www.runoob.com/wp-admin/admin-ajax.php';
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		//console.log($('#runoobvote-id').upvote('upvoted'));
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		_vote_action = data.action;
		id_arr = data.id.split('-');
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